Thermoelectric Power of Tetrathiofulvalinium Tetracyanoquinodimethane

Abstract
Measurements of the thermopower of the organic conductor tetrathiofulvalinium tetracyanoquinodimethane have been made in the region 10-300°K. At high temperatures (T>140°K) the samples are metallic showing increased electron correlations as the temperature is lowered to about 56°K. At this point the thermopower is zero and a discontinuity marks the transition to the insulating state.

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